Service Adjustment Procedure: Caliper: Disassembly

Fig 1: Illustrating Caliper Components

1. Loosen the bleeder screw and drain the brake fluid out of the caliper. Install the bleeder screw.
2. Remove the dust boot retaining ring.
   Fig 2: Removing Dust Boot Retaining Ring

   
3. Position a block of wood or a roll of shop towels between the piston and the caliper.
   WARNING: DO NOT USE AN EXCESSIVE AMOUNT OF AIR PRESSURE TO REMOVE THE PISTON. EXCESSIVE PRESSURE CAN FORCE THE PISTON OUT OF THE CALIPER BORE WITH ENOUGH FORCE TO CAUSE PERSONAL INJURY. NEVER ATTEMPT TO CATCH THE PISTON BY HAND AS IT COMES OUT OF THE CALIPER BORE.
   Fig 3: Removing Caliper Piston

   
   NOTE: Compressed air can be used as an alternative to removing the caliper piston. Apply the air pressure through the fluid inlet port. Apply only enough pressure to ease the piston out of the bore.
4. Remove the piston
5. Remove the dust boot from the piston and discard.
   Fig 4: Removing Dust Boot From Piston

   
   CAUTION: Do not use a screwdriver or other metal tool. A metal tool can scratch or nick the seal groove resulting in a possible leak.
6. Remove the piston seal from the caliper bore. Use a plastic or wooden stick to remove the seal.
   Fig 5: Removing Piston Seal

   
7. Remove the bleeder screw.
8. Remove the caliper bushings and the bushing seals.
   Fig 6: Removing Caliper Bushings & Seals

   
   CAUTION: Do not use petroleum based solvent, kerosene, or gasoline for cleaning caliper parts. Their use as a cleaning agent can leave residues which can damage the rubber seals.
9. Wash the parts in clean denatured alcohol and dry with compressed air.